In a special message to Congress, President Dwight Eisenhower requested authorization to provide economic and military assistance, including armed force if necessary, to Middle Eastern countries threatened by Soviet-backed aggression. The policy responded directly to the destabilizing Suez Crisis of 1956 and aimed to fill the power vacuum left by declining British and French influence in the region.
The Suez Crisis had exposed an uncomfortable truth for Washington: America's two most powerful Western allies, Britain and France, no longer commanded the authority they once had in the Middle East, and the Soviet Union stood ready to exploit the gap.
Eisenhower's message to Congress framed the stakes in stark Cold War terms, warning that international communism sought to dominate the Middle East for its strategic location and oil resources. He requested $200 million in economic and military aid, along with authority to deploy U.S. armed forces to defend any Middle Eastern nation requesting help against communist aggression.
Congress approved the doctrine in March 1957, and it was first invoked in 1958 when the U.S. sent Marines into Lebanon amid political turmoil. The doctrine marked a significant expansion of direct American military commitment in the Middle East, establishing a precedent for intervention that would echo through decades of subsequent U.S. policy in the region.